What is SRI Satellite Radio Interface
www.itu.int/dms_pub/itu-d/opb/stg/D-STG-SG02.25-2014-MSW-E.docx
In the realm of satellite communications, there isn't a universally recognized term "SRI" that directly translates to "Satellite Radio Interface." However, there are two possibilities related to satellite radio interfaces that might be relevant depending on the context:
- Non-Terrestrial Networks (NTN) and Feeder Link:
- In the context of 3GPP (3rd Generation Partnership Project) standards for Non-Terrestrial Networks (NTN), the term "feeder link" can be referred to as the Satellite Radio Interface (SRI).
- This feeder link establishes communication between the satellite and the NTN gateway on the ground.
- It's important to note that this usage of SRI refers to the communication channel between the satellite and the network infrastructure, not the interface between the user equipment and the satellite.
- ITU-R M.1850 - Satellite Radio Interfaces for IMT-2000:
- The International Telecommunication Union Radiocommunication Sector (ITU-R) Recommendation M.1850 defines various "Satellite Radio Interfaces" (SRIs) designated with letters (SRI-A, SRI-B, etc.)
- These SRIs specify the air interface protocols used for communication between user equipment and the satellite network for IMT-2000 (International Mobile Telecommunications-2000) systems.
- IMT-2000 encompasses various technologies like Wideband Code Division Multiple Access (W-CDMA) used for satellite communication.
Understanding the Difference:
- The key distinction lies in the focus:
- NTN feeder link SRI refers to the communication channel between the satellite and the network on the ground.
- ITU-R M.1850 SRIs define protocols for communication between user equipment and the satellite network.